/* roulang page: index */
:root {
      --color-primary: #1D4ED8;
      --color-primary-dark: #1E40AF;
      --color-accent: #6366F1;
      --color-dark: #0F172A;
      --color-dark-alt: #0B0F19;
      --color-slate: #334155;
      --color-muted: #64748B;
      --color-border: #E2E8F0;
      --color-bg-light: #FAFAFC;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    }
    body {
      background-color: var(--color-bg-light);
      color: var(--color-slate);
      line-height: 1.6;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
    }
    .hover-card-trans {
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .hover-card-trans:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
    }
    .badge-glow {
      box-shadow: 0 0 15px rgba(99, 102, 241, 0.35);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 240px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }